My Westinghouse LCD Monitor was working fine with my old computers on VGA port until I got a new Dell XPS 8500 with Nvidia GT640 video card. I tried to use the HDMI because of my I hate the extra adapter converting DVI to VGA. The image through HDMI looks horrible on L2410NM. The color is washed up.

I googled around and realized it is the monitor’s fault for not giving correct EDID. Someone on hardforum.com has a smart solution without messing up with the video card’s driver. It is a Windows Registry change:

Hey here is the fix, it works this way without editing the driver inf file and it works in Vista and Win7. I don’t know if it works in XP.

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Run Regedit & Navigate to:

HK_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video

Open the folder & check each folder (eg. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video\{E 0CC2030-CCD8-49B9-8267-83140EF868CB} )

Check each sub folder called “0000” until you come across one which expands and includes the following:

>Display
>Settings
>Uninstall
>Volatilesettings

Once you’ve located this, right click the “0000” folder and select “New” followed by “Binary Value”.

Rename the value to:

OverrideEdidFlags0

and hit enter or okay

Next up, you need to right click the new key and select “Modify Binary Data” from the list.

Enter in this info below:
5c 85 80 51 00 00 ff ff 04 00 00 00 7e 01 00

After you enter the info in the value will show as (invalid DWORD (32-bit) value) but this is correct. Reboot and your monitor will work once again. BTW you will need to do this after every driver installation. I have experienced some severe blanking and weird noises from the monitor after some driver upgrades. You might want to connect up the VGA when updating drivers.

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Yes, it worked for me. Note this solution is only for this exact model of monitor.

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